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Hace 5 días · tetrapod, (superclass Tetrapoda), a superclass of animals that includes all limbed vertebrates (backboned animals) constituting the classes Amphibia , Reptilia , Aves , Mammalia , and their direct ancestors that emerged roughly 397 million years ago during the Devonian Period.
Hace 3 días · Amphibians are vertebrate animals that are cold-blooded (ectothermic) and have four limbs. Besides this, amphibians generally go through a life cycle that involves egg-laying (and hatching) in water and metamorphosis in their bodies — both inside and out.
Hace 5 días · Hippopotamus (Hippopotamus amphibius) mostly submerged in water. Hippos favour shallow areas where they can sleep half-submerged (“rafting”). Their populations are limited by this “day living space,” which may become quite crowded; as many as 150 hippos may use one pool in the dry season.
Hace 3 días · Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living reptiles comprise four orders: Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ). As of May 2023, about 12,000 living species of reptiles ...
Hace 1 día · The largest animal currently alive is the blue whale. The maximum recorded weight was 190 tonnes for a specimen measuring 27.6 metres (91 ft), whereas longer ones, up to 33 metres (108 ft), have been recorded but not weighed.
Hace 1 día · The largest prehistoric animals include both vertebrate and invertebrate species. Many of them are described below, along with their typical range of size (for the general dates of extinction, see the link to each).
Hace 3 días · Caecilians are legless amphibians that resemble worms or snakes. They are found in tropical regions and are mostly burrowing animals. Importance of Amphibians. Amphibians play a crucial role in our ecosystems. They are important predators of insects and other invertebrates, helping to control pest populations.
